Yes, your best bet is to use a sturdy plank big enough to contact the entire bottom surface of the oil pan to distribute the load. When raising the engine, however, you must watch very closely to see that there is no contact between engine and firewall. Also only raise it as high as necessary to keep from stressing such areas as radiator necks and the like.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual. It still needs upholstery redone...I also have a 427 Cobra replica with an aluminum chassis.